The Ssi-ruuvi Imperium's Unit Commander Th'twirirl, a Ssi-ruu, took part in his species' venture into the galaxy, seeking new beings for entechment. As Unit Commander, he was assigned to the landing parties that attacked the world of G'rho. While there, the young Dev Sibwarra was captured, whom Entechment Chief Yifaii planned to eliminate; Th'twirirl intervened, giving the youngling to Yifaii's subordinate, Firwirrung.